Numerical Analysis Of Natural Convection In A Closed Circular Cavity With A Elliptical Heater

Abstract

The natural convection heat transfer in a closed circular cavity containing a constant temperature elliptic heating body was studied by finite volume method. The influences of Rayleigh number Ra, relative size of heating element and rotation Angle on flow and heat transfer in the cavity are discussed. The variation range of Rayleigh number is 103 ~ 106, the variation range of length-diameter ratio of elliptic long axis to cavity diameter is 0.1 ~ 0.4, and the variation range of rotation angle is 0° ~ 90°.The results show that the changes of the above three parameters can affect the structure of temperature field and flow field in the cavity. Increasing the Rayleigh number, decreasing the size of the heating element and increasing the rotation Angle of the heating element will be more conducive to the heat transfer in the cavity. The research results can provide theoretical basis for the heat dissipation and management of electronic equipment.